It is possible to complete each mission in just one turn
if you select the Imperial Fists division and choose the
Heavy Weapon order. This enables your marines and the
captain to move and fire twice in the same round.
Choose a mission. Enter it and then on your first round
of play initiate your Heavy Weapon order. Don't use your
bolter marines but move the rest of them twice and fire
twice with all of the squad. Click on any marine and all of
his movement and fire orders are restored enabling you to
use him again. This works for all of the non-bolter group
enabling you to move fire and complete the mission all within
one turn and without any enemy getting the opportunity to
fire at you.